Northymbre

Northymbre was a Viking kingdom in northern England which existed from 867 to 954. The kingdom, centered around the city of Jorvik (York), was established following Halfdan Whiteshirt and the Great Heathen Army's conquest of Northumbria, but Halfdan's death in Ireland in 877 led to Northymbre being kingless until 883, when Guthred took over. In 927, King Aethelstan of Wessex conquered Jorvik and drove the Vikings from Northymbre, which was annexed to England. Eric Bloodaxe briefly restored Viking rule from 947 to 948 and from 952 to 954, but Eadred of England succeeded in convincing the Anglo-Saxon earls to betray him in 952. Eric's death in 954 led to the permanent English annexation of Northymbre.